vec3 is used at run time in 12 crates. It is a direct run-time dependency in 5 crates. It's used only as a dev dependency in 3 crates (of which 1 directly).

Depender (with downloads and own rev deps) vec3 version
210 6 vec2 ^0.2
6 mat4 ^0.2
2 vec4 ^0.2
1 aabb3 ^0.2
gmath ^0.2
2 gl_helpers dev ^0.2